FILE - In this Sept. 27, 2019 file photo, Swedish climate activist and student Greta Thunberg smiles on stage after addressing the Climate Strike in Montreal, Quebec. Thunberg plans to join a climate strike in Denver on Friday, Oct. 11. The event near the state Capitol will include a panel of youth activists and end with a die-in which organizers say will symbolize the millions of people facing danger and death because of climate change. (Paul Chiasson/The Canadian Press via AP, File)
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